Measurements of the Electric Form Factor of the Neutron up to Q2=3.4 GeV2 using the Reaction He3(e,e'n)pp

The electric form factor of the neutron was determined from studies of the reaction He3(e,e'n)pp in quasi-elastic kinematics in Hall A at Jefferson Lab. Longitudinally polarized electrons were scattered off a polarized target in which the nuclear polarization was oriented perpendicular to the m...

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Published in:arXiv.org 2010-11
Main Authors: Riordan, S, Abrahamyan, S, Craver, B, Kelleher, A, Kolarkar, A, Cates, G D, Liyanage, N, Wojtsekhowski, B, Acha, A, Allada, K, Anderson, B, Aniol, K A, Annand, J R M, Averett, T, Beck, A, Bellis, M, Boeglin, W, Breuer, H, Chudakov, E, Coman, L, Crowe, B, Cusanno, F, Day, D, Degtyarenko, P, Dolph, P A M, Dutta, C, Ferdi, C, Fernandez-Ramirez, C, Feuerbach, R, Fraile, L M, Frullani, S, Fuchs, S, Garibaldi, F, Gevorgyan, N, Gilman, R, Gomez, J, Grimm, K, Hansen, J O, Higinbotham, D W, Holmes, R, Holmstrom, T, Howell, D, deJager, C W, Jiang, X, Katich, J, Khandaker, M, Kelly, J J, Kiselev, D, Korsch, W, Lindgren, R, Markowitz, P, Margaziotis, D J, S May-Tal Beck, Mayilyan, S, McCormick, K, Meziani, Z E, Michaels, R, Moffit, B, Nanda, S, Nelyubin, V, Ngo, T, Nikolenko, D M, Pentchev, L, Perdrisat, C F, Piasetzky, E, Pomatsalyuk, R, Protopopescu, D, Puckett, A J R, Punjabi, V A, Qian, X, Qiang, Y, Quinn, B, Rachek, I, Ransome, R D, Reimer, P E, Roche, J, Rondon, O, Rosner, G, Saha, A, Sargsian, M, Sawatzky, B, Segal, J, Shahinyan, A, Yu Shestakov, Singh, J, Sirca, S, Souder, P, Stepanyan, S, Stibunov, V, Tobias, W A, Udias, J M, Urciuoli, G M, Vlahovic, B, Voskanyan, H, Wang, K, Wesselmann, F R, Vignote, J R, Wood, S A, Wright, J, Yao, H
Format: Article
Language:English
Subjects:
Electrons
Form factors
Kinematics
Momentum transfer
Neutrons
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Summary:The electric form factor of the neutron was determined from studies of the reaction He3(e,e'n)pp in quasi-elastic kinematics in Hall A at Jefferson Lab. Longitudinally polarized electrons were scattered off a polarized target in which the nuclear polarization was oriented perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons that were registered in a large-solid-angle detector. More than doubling the Q2-range over which it is known, we find GEn = 0.0225 +/- 0.0017 (stat) +/- 0.0024 (syst), 0.0200 +/- 0.0023 +/- 0.0018, and 0.0142 +/- 0.0019 +/- 0.0013 for Q2 = 1.72, 2.48, and 3.41 GeV2, respectively.
ISSN:2331-8422
DOI:10.48550/arxiv.1008.1738